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AVRO (.avro)

.avro file signature | application/octet-stream

Apache Avrobinary file format

Safe

Magic Bytes

Offset 0
4F 62 6A 01

Sources: Wikipedia

Extension

.avro

MIME Type

application/octet-stream

Byte Offset

0

Risk Level

Safe

Validation Code

How to validate .avro files in Python

Python
def is_avro(file_path: str) -> bool:
    """Check if file is a valid AVRO by magic bytes."""
    signature = bytes([0x4F, 0x62, 0x6A, 0x01])
    with open(file_path, "rb") as f:
        return f.read(4) == signature

How to validate .avro files in Node.js

Node.js
function isAVRO(buffer: Buffer): boolean {
  const signature = Buffer.from([0x4F, 0x62, 0x6A, 0x01]);
  return buffer.subarray(0, 4).equals(signature);
}

How to validate .avro files in Go

Go
func IsAVRO(data []byte) bool {
    signature := []byte{0x4F, 0x62, 0x6A, 0x01}
    if len(data) < 4 {
        return false
    }
    return bytes.Equal(data[:4], signature)
}

API Endpoint

GET /api/v1/avro
curl https://filesignature.org/api/v1/avro

See the full API documentation for all endpoints and parameters.

Frequently Asked Questions

What is a .avro file?

A .avro file is a AVRO file. Apache Avrobinary file format

What are the magic bytes for .avro files?

The magic bytes for AVRO files are 4F 62 6A 01 at byte offset 0. These bytes uniquely identify the file format regardless of the file extension.

How do I validate a .avro file?

To validate a .avro file, read the first bytes of the file and compare them against the known magic bytes (4F 62 6A 01) at offset 0. This is more reliable than checking the file extension alone, as extensions can be renamed.

What is the MIME type for .avro files?

There is no officially registered MIME type for .avro files. Systems typically use application/octet-stream as a generic fallback when handling this format.

Is it safe to open .avro files?

AVRO (.avro) files are generally safe to open. They are classified as low risk because they primarily contain data rather than executable code. However, always ensure files come from a trusted source.